Valve reseater



` 1,616,498 Feb- 8 1927' w. M. HowsER VALVE RESEATER v Filed July 1,1925 2- Sheets-Sheet l w. M. HowsER Feb. 8, 1927.

VALVE RESEATER Filed July l, 1925 2 Sheets-Sheet 2 #V0/fel HOL() 619/,31u/muro@ Patented Feb.- 8, 1927.

UNITED serres WALTER ZM. HOWSER, F HAMMOND, INDIANA..

VALVE BESEATEB.

application sled' July 1, 1925. serial No. 40,910.

This linvention appertains `to tools and the guide sleeve for the valve,so as to efectively hold the pilot or self-centering mandrel againstmovement and in correct axial alinement with the valveseat.

A further object of 'the invention is the provisionl of a novel sleevefor receiving the refacing tool, so as to prevent play or lost movementof the sleeve radially on the pilot or self-centering mandrel.

A further object of the invention is to 2L provide novel means forconnecting the refacing tool with the said sleeve, so that the same canbe readily removed to allow a number of different types of tools to beassociated with the sleeve. fh) A still further object ofthe inventionis to provide a novelvalve reseater of the improved character, whichwill permit then refacing' of, valve seats in an expeditious and highlysatisfactory manner. v

With these and other objects in view, the invention consists in thenovel construction, arrangeiment and formation of parts, as willbe'hereinafter more specifically claimed, described, and illustrated inthe ac:- companying drawings, in which drawings: Fig-ure 1 is a sideelevation of the improved tool showing the same in use,

Figure 2 is a longitudinal section through the tool showing the pilot inelevation,

proved device,

Figure 4 is a detail horizontal section faken on the line 4 4 of Figure2 looking .n the. direction of the ar-rows lshowing the -fleeve andmandrel or pilot in section illustrating the novel formation of thesleeve to eliminate lost motion,

Figure 5 is a detail horizontal section taken on the line 5-5 of Figure2 looking M inthe direction of the arrows through the Figure-3 is a topplan view of the imupper end of n the sleeve, illustrating the formationof the sleeve, e

Figure l6' is a detail section; through the pilot or self-centeringmandrel taken on the line 6 6 of Figure 2 looking in the direction ofthe arrows, showing the locking means for the lower end of thesaidmandrel or pilot in plan, and v 4 l Figure 7 is a detailsectionthrough the pilot taken on the line 7,7 of Figure 2 showing thecrossv sectional configuration of the pilot for engaging the upper endofthe valve ide to facilitate the centering of the. said pllot ormandrel,

Figure 8 is a view similar to Figure 2 70 taken on a smaller scaleshowing the screw\ feed head and` cutting,tool-connectedwith the mandrelto bore out theivalve port holes,

Figure 49 is atop plan view ofthe same,

Figure 10 is a detail section takenl on the 75 line 10-10 of Figure 8looking in the direction of the arrows, l

Figure 11 is a detail perspective view of one of the cutting blades, A

Figure 12 is a detail perspective view of the operating handle for theboring tool.

Referring to the drawings in detail, wherein similar referencecharacters designate corresponding parts, throughout the several views,the letter A generally indicatesY thev improved valve reseater and B afragment of an; internal combustion engine with which the improved toolA can be associated.

The engine B can be ofthe usual or any preferred character and hassimply been shown to illustrate the use of the tool. As disclosed theengine is provided with the, usual type of valve'seat 5 and guidelsleeve 6 for the valvestem (not shown).. When l the valve seat 5 is tobe refaced, the valve 96 and valve stem are removed in the ordinarymanner and the improved-tool A associated.'

-with the engine lin lieu thereof.

Thev imroved tool A comprises first a novel sel -centering mandrel orpilot 10 which is adapted to be inserted through the valveseat 5 and thevalve guide seat 6. This novel 'pilot or self-centerin mandrel 10-includes anl upper cylindrica body portion v 11 and a lower smoothcylindrical shank 1N 12 which is adapted to extend into the' valvesleeve 6. The shank 12 is connected withthe bodyr 11 by a taperedportion 13 which is rovldedl at ui-distantly spaced pointsu .g mglextension l carries novelmeans 17for enlus aging the lower end of thevalve guide 6 or cooperating with the tapered portion 13 of the pilot orself` centering, mandrel 10 and this means embodies a hollow cone 18slidably mounted upon said extension, and which acts in the nature of awedge. It `is preferred to provide recesses 19 at spaced points on theouter face of the conecasing to provide ribs 20 for engaging the innerface of the lower end to. said valve guide of'l the engine and theseribs define sharp longitudinally extending edges for engaging the saidsleeves in order to positively center the -mandrel or pilot in place.The cone 1.8 is adapted to be moved into and out of locking posit'onby-means of anut 21 which is threaded upon the thread 16 of the exten-vsion 15 and the upper face of the nut is provided with a recess 22 forreceiving ahead 23 formed on the lower end of the cone. If' desired theupper en'd of thewall of the recess 22 can be upsetas at24 so as to holdthe head in position. The head is of annular construction and permitsfree rotation of the nut relative to the cone, while at the same timesliding the cone into and outof locking engagement with the sleeve.

The improved novel tool carrying sleev of the device is indicated by thereference character 25 and at va point spaced from its upper and'lowerends is provided with annular ribs 26 and 2 7 the outer faces of whichcan be serrated or -otherwise roughened.4 The portion of the to'olcarryingl sleeve between the annular'ribs 26 and 27-is provided withdiametrically oppositely longitudinal ribs 28 andA 29 which can besprung into and out o`f intimate contact lwith 4the body portion 11 ofthe mandrel to take up any lost play and screws 32 arethreaded throughthe slit portion of the ribs 28 and 29 in order to adjust the sectionsv3l. The upper and lower ends of the slits or slots 30-communi cate withoppositely directed semi-circularl slots 33 which end slightly short ofthe oppositeribs in order to provide connecting portions 35 and therebyprevent the entire separation of said sections'il. It preferred theslots 30 and the 'semi-circular slots33 can be packed with cork or someother` suitable compressible material 36 as shown.

The extreme upper endr of the sleeve 25 is provided with a polygonalshaped head 37 inorder to permit a wrench to be as socia'ted therewith,whereby the sleeve 25 can be'rota'ted on the pilot, for a purpose, whichwill be hereinafter more fully described. The lower end'of the sleevebelow the annular rib or collar 27 is provided with a' vIt is obviousthat the Lemmon per and lower ends of the bore are enlarged and vtaperedas at 41 to provide seats for engaging the -tapered portion 39 of thesleeve. One end of the cutter 40, which is of annular construction, isprovided with cutting teeth 42 arranged at an angle to the longitudinalaxis of the sleeve or'providing the beveled valve seat. The oppositeface of the cutter can be provided With teeth 43 all arranged in ahorizontal plane for .smoothing off the upper face of the valve seatwhen the same is'chipped or otherwise mutilated. osition 'of the cuttercan be readily reverse on the threaded extension 28 so as to bringeither the teeth 42 orthe teeth' 43 into pla In' use of theimproved-device, after 'the valve vand valve lsteinhave been removedfrom the enginethe pilot 10 is inserted through the valve seat into thevalve sleeve l6 until the conical portion 13 of the pilot engages theupper edge of the said valve guide stem sleeve. in position and iseffectively centered by the use of the cone 18. The desired tool 40 is'associated with the lower end of the valve tool carrying sleeve .25 andthe sleeve 25 is then slid on the body portion ofthe pilot. A suitablewrench can now be applied'to the sleeve and the sleeve turned until theseat has been .refaced Owing to the construction. of the tool carrying`sleevel and the fact that the mandrel or pilot l0 is correctly centered,the valve will be refaced true and. thus proper seating of the valve ispositively insured. l

Attention is also invited to the threaded extension 45 formed on theupper end of the pilot o r self-centering mandrel 10 4and this extensionisprovided with a diametrically extending key way 46. This extension andkey way is used, when it .is desired to lock a different type of toolcarrying sleeveor screw feed head 47 to the mandrel 'for vboring out thevalve port holes true. This screw feed head 47 is provided with a smoothcylindrical bore 48 for 'fitting on theupper end of the mandrel and theextreme upper Aend of the bore is provided with a threaded' socket`4).,1for receiving the threaded extenlsion 45 of the said mandrel.

A key 50 is The pilot is now locked' employed for locking the feed headto the mandrel and the ke [its in the keyway 46. Thevouterface of t ehead 47 is provided with feed screw threads 51 throughout its entirelength and has threaded thereonthe novel boring-tool 52which will now bede-y tension 57 for receiving an operating handle or crankl 58. The toolis 'applied to the engine in the same manner as the tool heretobeforedescribed and it can be seen that as lthe/collar 53 is rotated that thesame 4will be .fed down bythe screw threads,

which will effectively true the valve port holes..A v l- Changes indetails may be made Without departing. from the spirit or scope of thisinvention, but:

y'What I claim as new is:

1. vIn. a valve resurfacing-tool, the com-I binati'bn with aself-centering mandrel embodying a cylindrical body portion having`1ltatable and slidable tool carrying sleeve fita reduced cylindricalextension formedl on the-Ilowerfend of the body portion, and

' ay tool" carried by the' body portion, Vthefupper end vof said reducedextension being providedwith a taperedcentering bearing portion forengaging the upper end of a valve guide stem sleeve, the surface of saidtapered bearing portion provided at spaced 'points with fiat plainfaces'defining longitudinal edges for biting contact with said valveguideistem sleeve, of a centering cone slidably mounted upon the lowerend of the extension .for engaging the lower end of said valve guidestem sleeve,V the outer face lof the `cone being provided at spacedpoints with longitudinally extending ribs defining longitudinallyextending edges for biting Contact with said valve guide stem, and a nutrotatably carried bythe lower end of the centering cone and threadedupon said extension.

2. In a valve resurfacing tool, a self-cena tering mandrel including abody portion adapted to extend axially through a valve seat, and areduced extension adapted to extend through `a valve stem guide sleeve,

means for lockingthemandrel in a centered position in said'v valve stemguide sleeve, a tool carrying sleeve rotatably and slidably mounted uponSaid body portion of the mandrel including a main portion having annularcollars formed thereon adjacent to the upper and lower .end thereof, themain portion being provided with longitudinally extending ribs providedwith longitudinally extending slots, the collars be- 1ng provided withoppositely directed semicircular slots communicating therewith, acom'pressible member fitted in said slots, take-up means extendingthrough the ribs, a wrench engaging member formed on the upper end ofthe sleeve, and a tool detachl ably fitted on said sleeve below thelowermost collar.

3. In a valve resurfacing tool, a self-centering mandrel including acylindrical body 'zov portion and a reduced extension adapted to extendthrou h a valve stem guide sleeve, means for lockmg and centering themandrel against movement in said sleeve, a roted l upon the body portionof the rmandrel including a -main body portion having annular collarsformed thereiny adjacent to the upper and lower ends thereof, andlongitudinally extending ribs connecting said a threaded bore forreceiving said' threaded ,95 i tapered for engaging said tapered faceand extension having the opposite ends thereof provided with cuttingteeth of different types. l

In testimony whereof I affix mv si nature.

WALTER M. Ho SER.

